ASA 127th Meeting M.I.T. 1994 June 6-10

Data collected and processed in near-field acoustical holography are
inherently multi-dimensional. The data span two spatial dimensions (or their
transform-space counterparts) and a dimension in either time or frequency, and
the quantities of interest within those spaces also represent dimensions.
Various processes, such as multiple projections or time-frequency transforms,
can increase the dimensionality even further. When powerful, inexpensive
graphics display systems became available, they brought the capability for
viewing at least four dimensions simultaneously (two in the screen space, one
implicit in space via depth cues, and one in color). A public domain package
called ``BoB'' (for ``Brick-of-Bytes''), provided by the Army High Performance
Computing Research Center (AHPCRC), was used to view large blocks of
holographic data in four dimensions. This work examines our experiences in
trying to explore holographic data using this form of visualization. It was
found to be inferior in comparison to currently used forms of visualizing data,
in particular, mosaics of false-color plots. Reasons for this apparent lack of
success will be discussed.

All posters will be on display from 1:30 p.m. to 3:30 p.m. To allow
contributors an opportunity to see other posters, contributors of odd-numbered
posters will be at their posters from 1:30 p.m. to 2:30 p.m. and contributors
of even-numbered posters will be at their posters from 2:30 p.m. to 3:30 p.m.